Use the new build env on Travis

[joshk]

more ram, dedicated cpus, better networking, more capacity

[zuazo]

Thanks @joshk for your contribution.

Please, can you explain your proposal in more detail? I only see this in the diff:

- - 2.1.0
+ - 2.1

+sudo: false

I am somewhat confused 😕

[joshk]

Changing the ruby version means the latest 2.1 version is always used.

sudo: false routes the job to the new build env.

[zuazo]

OK. Here is the documentation: http://docs.travis-ci.com/user/workers/container-based-infrastructure/

I'll merge this if the build ends successfully.

Thank you!

[coveralls]

Coverage remained the same when pulling e6b7b78 on joshk:patch-1 into 4cb5652 on onddo:master.